LG G3 LS990ZV6 how to get Service Code? HELP

[agent_lia]

phone asking to put the code.
software does not give a code to enter to enable the diag mode.

Welcome to Octoplus/Octopus Box LG Software version 2.4.7
--------------------------------------------------------------------------------
Checking data...OK
Platform: LG Qualcomm
Selected port: COM19
Selected model: LS990
Reading info...
Initializing ADB...OK
Waiting for phone...OK
Model ID: LGLS990
Firmware version: LGLS990AT-00-ZV6-SPR-US-NOV-07-2014+00
Kernel version: 3.4.0-perf-gb79e1da (lgmobile@LGEACI1R3) (gcc version
4.7 (GCC) ) #1 SMP PREEMPT Fri Nov 7 20:57:01 KST 201
Android version: 4.4.2
Hardware: Qualcomm MSM8974PRO-AC ARMv7 Processor rev 1 (v7l)
Please, type ##3424# to get SPC / MSL / Service Code...OK
Go to "Diag" menu and select "Enable" option.
Performed by 2.4.7 Software version.

usb debugging is enabled
usb charge only chosen.

i think this LS990ZV6 is different from LS990ZV4 and LS990ZV10